Lifting platform

Abstract

The utility model discloses a lifting platform which comprises a bearing platform, a lifting support, a driving device and a chassis. The lifting support comprises a first lower supporting rod, a second lower supporting rod, a first upper supporting rod, a second upper supporting rod, a first connecting rod and a second connecting rod. One end of the first lower supporting rod is pivoted with one end of the chassis, and the other end is pivoted with the lower end of the first connecting rod; the upper end of the first connecting rod is pivoted with the first upper supporting rod; one end of the first upper supporting rod is pivoted with the other end of the bearing platform, and the other end is pivoted with the upper end of the second connecting rod; the lower end of the second connecting rod is pivoted with the first lower supporting rod; one end of the second lower supporting rod is pivoted with the other end of the chassis, and the other end of the second lower supporting rod is coaxially pivoted with a pivoting shaft for mutually pivoting the second connecting rod and the first upper supporting rod; one end of the second upper supporting rod is pivoted with the other end of the bearing platform, and the other end of the second upper supporting rod is coaxially pivoted with a pivoting shaft for mutually pivoting the first connecting rod and the first lower supporting rod. The lifting device can achieve lifting, and is high in use safety and long in service life.

Description

Technical Field

[0001] The utility model relates to a lifting platform, in particular to a lifting platform which is convenient to unfold or fold and safe to use. Background Art

[0002] A lifting platform is an auxiliary tool that facilitates the handling of heavy objects or high-altitude operations in daily life. It generally includes a chassis, a lifting bracket, and a loading platform. By extending or contracting the lifting bracket, the loading platform can be raised or lowered. However, most of the lifting brackets of existing lifting platforms use a scissor structure to achieve lifting. For example, the lifting platform with the patent number 202222069508X uses a scissor-type lifting bracket to lift the loading platform. When this structure of the lifting bracket rises, a support rod at the lower end needs to be in sliding contact with the chassis, and a support rod at the upper end also needs to be in sliding contact with the loading platform. Therefore, when the lifting platform is fully unfolded, a support rod at the upper end of the lifting bracket will slide to the middle of the loading platform, and a support rod at the lower end will slide to the middle of the chassis. At this time, the support positions received by the loading platform will change accordingly, and the support position will be biased towards one side of the loading platform, while the other side of the loading platform has no support. When the user is on the side without support, the loading platform is unbalanced in force, which is likely to damage the lifting platform and is also prone to tipping, posing a certain safety hazard to the user. Summary of the Utility Model

[0003] The purpose of the utility model is to provide a lifting platform that can achieve lifting, and when lifting the loading platform, the four sides of the loading platform are supported, improving the use safety and extending the service life.

[0004] To achieve the above object, the lifting platform provided by the utility model comprises a bearing platform, a lifting bracket, a driving device and a chassis. The lifting bracket is connected between the bearing platform and the chassis. The lifting bracket includes a first lower support rod, a second lower support rod, a first upper support rod, a second upper support rod, a first connecting rod and a second connecting rod. One end of the first lower support rod is pivotally connected to one end of the chassis, and the other end is pivotally connected to the lower end of the first connecting rod. The upper end of the first connecting rod is pivotally connected to the middle of the first upper support rod. One end of the first upper support rod is pivotally connected to the other end of the bearing platform, and the other end is pivotally connected to the upper end of the second connecting rod. The lower end of the second connecting rod is pivotally connected to the middle of the first lower support rod. The second lower support rod is arranged in a crosswise manner with the first lower support rod, and one end of the second lower support rod is pivotally connected to the other end of the chassis, and the other end is pivotally connected to one of the second connecting rod and the first upper support rod or is pivotally connected coaxially with the pivot axis of the mutual pivotal connection between the second connecting rod and the first upper support rod. The second upper support rod is arranged in a crosswise manner with the first upper support rod, and one end of the second upper support rod is pivotally connected to the other end of the bearing platform, and the other end is pivotally connected to one of the first connecting rod and the first lower support rod or is pivotally connected coaxially with the pivot axis of the mutual pivotal connection between the first connecting rod and the first lower support rod. The driving device is arranged between the bearing platform and the chassis and drives the lifting bracket to unfold or fold, so that the bearing platform approaches or moves away from the chassis.

[0005] Compared with the prior art, since the utility model forms a deformable parallelogram structure among the first lower support rod, the second lower support rod, the first upper support rod, the second upper support rod, the first connecting rod and the second connecting rod by pivoting one end of the first lower support rod to one end of the chassis and the other end to the lower end of the first connecting rod; pivoting the upper end of the first connecting rod to the middle of the first upper support rod; pivoting one end of the first upper rod to the other end of the bearing platform and the other end to the upper end of the second connecting rod; and pivoting the lower end of the second connecting rod to the middle of the first lower support rod. Therefore, the first lower support rod, the first upper support rod, the first connecting rod and the second connecting rod can form a deformable parallelogram structure. Then, pivot one end of the second lower support rod to the other end of the chassis, and the other end to either the second connecting rod or the first upper support rod or coaxially pivot to the pivot shaft where the second connecting rod and the first upper support rod are pivotally connected to each other; pivot one end of the second upper support rod to the other end of the bearing platform, and the other end to either the first connecting rod or the first lower support rod or coaxially pivot to the pivot shaft where the first connecting rod and the first lower support rod are pivotally connected to each other, so that both ends of the bearing platform can be jointly supported by the first upper support rod and the second upper support rod. Moreover, this lifting bracket enables the first lower support rod or the second lower support rod not to be connected to the chassis in a relatively sliding manner, and the first upper support rod or the second upper support rod not to be connected to the bearing platform in a relatively sliding manner. Therefore, the utility model can avoid the traditional scissor structure, can not only realize the lifting of the lifting platform, but also enable the bearing platform to be strongly supported on all sides after rising, with more balanced force, effectively preventing rollover, thus having higher safety and longer service life.

[0006] Preferably, one end of the driving device is pivotally connected to either the bearing platform or the first upper support rod, and the other end of the driving device is pivotally connected to either the chassis or the first lower support rod.

[0007] Preferably, the driving device is a linear driver.

[0008] Preferably, the chassis is provided with traveling wheels. This can facilitate the movement of the lifting platform and improve the convenience of use.

[0009] Preferably, the lifting bracket further includes support feet, which are arranged on the chassis and can extend out of the chassis when the bearing platform rises and retract into the chassis when the bearing platform descends. By providing the support feet, support points can be added to the chassis, thereby enhancing the stability of the chassis.

[0010] Specifically, the lifting bracket further includes a linkage mechanism. One end of the linkage mechanism is disposed on one of the first lower support rod and the second lower support rod, and the other end is disposed on the support foot to drive the support foot. By providing the linkage mechanism, the support foot can be automatically driven to expand and contract when the lifting bracket is lifted or lowered, so that it is not necessary to manually operate the support foot, improving the convenience of use.

[0011] Specifically, the linkage mechanism includes a linkage rod. The upper end of the linkage rod is pivotally connected to one of the first lower support rod and the second lower support rod, and the lower end is slidably disposed on the chassis. One end of the support foot is connected to the lower end of the linkage rod.

[0012] Specifically, a sliding seat is pivotally connected to the lower end of the linkage rod. The sliding seat is slidably disposed on the chassis, and one end of the support foot is pivotally connected to the sliding seat.

[0013] Specifically, the support foot includes a first support rod, a second support rod and a support portion. One end of the first support rod is pivotally connected to the chassis, one end of the second support rod is pivotally connected to the sliding seat, the other end of the first support rod is pivotally connected to the other end of the second support rod, and the support portion is disposed on one of the first support rod and the second support rod or on the pivot shaft between the first support rod and the second support rod.

[0014] Specifically, a guide rod is provided on the chassis, a guide groove is provided on the guide rod, and the sliding seat is slidably disposed in the guide groove. This can guide the sliding movement of the linkage rod, making the expansion and contraction of the support foot smoother and more stable. Description of the Drawings

[0015] Figure 1 is a perspective view of the lifting platform according to the first embodiment of the present invention when it is deployed.

[0016] Figure 2 is a side view of the lifting platform according to the first embodiment of the present invention when it is deployed.

[0017] Figure 3 is a left view of the lifting platform according to the first embodiment of the present invention when it is deployed.

[0018] Figure 4 is a structural diagram of the bottom surface of the lifting platform according to the first embodiment of the present invention.

[0019] Figure 5 is a movement state diagram of each rod when the lifting platform according to the first embodiment of the present invention is folded.

[0020] Figure 6 is a state diagram of the lifting platform according to the first embodiment of the present invention after being folded.

[0021] Figure 7 It is a side view of the lifting platform in the second embodiment of the present utility model when it is deployed.

[0022] Figure 8 It is a side view of the lifting platform in the third embodiment of the present utility model when it is deployed. Detailed implementation manners

[0023] To describe in detail the technical content, structural features, and achieved effects of the present utility model, the following will be described in detail in conjunction with the implementation manners and with reference to the accompanying drawings.

[0024] As Figures 1 to 3 shown, the lifting platform 100 of the present utility model includes a bearing platform 1, lifting brackets 2, a driving device 3, and a chassis 4. The lifting brackets 2 are connected between the bearing platform 1 and the chassis 4, and the lifting brackets 2 are symmetrically arranged on both sides of the chassis 4; traveling wheels 5 are respectively provided near the four corners of the chassis 4. This can facilitate the movement of the lifting platform 100 and improve the convenience of use. The driving device 3 is located between the bearing platform 1 and the chassis 4 to drive the lifting brackets 2 to deploy or fold.

[0025] Please refer to again Figure 2, the lifting bracket 2 includes a first lower rod 21, a second lower rod 22, a first upper rod 23, a second upper rod 24, a first connecting rod 25 and a second connecting rod 26; one end of the first lower rod 21 is pivotally connected to one end of the chassis 4 with the pivot axis being a, and the other end is pivotally connected to the lower end of the first connecting rod 25 with the pivot axis being b. The upper end of the first connecting rod 25 is pivotally connected to the middle of the first upper rod 23 with the pivot axis being c. One end of the first upper rod 23 is pivotally connected to the other end of the carrying platform 1 with the pivot axis being d, and the other end is pivotally connected to the upper end of the second connecting rod 26 with the pivot axis being e; the lower end of the second connecting rod 26 is pivotally connected to the middle of the first lower rod 21 with the pivot axis being f. The first lower rod 21, the first upper rod 23, the first connecting rod 25 and the second connecting rod 26 enclose a deformable parallelogram structure. The second lower rod 22 is arranged crosswise with the first lower rod 21 but their middles are not pivotally connected to each other; one end of the second lower rod 22 is pivotally connected to the other end of the chassis 4 with the pivot axis being g, and the other end is pivotally connected coaxially with the pivot axis e where the second connecting rod 26 and the first upper rod 23 are pivotally connected to each other. The second upper rod 24 is arranged crosswise with the first upper rod 23 but their middles are not pivotally connected to each other; one end of the second upper rod 24 is pivotally connected to the other end of the carrying platform 1 with the pivot axis being h, and the other end is pivotally connected coaxially with the pivot axis b where the first connecting rod 25 and the first lower rod 21 are pivotally connected to each other. The driving device 3 is arranged between the carrying platform 1 and the chassis 4 and drives the lifting bracket 2 to unfold or fold so that the carrying platform 1 approaches or moves away from the chassis 4. Specifically, one end of the driving device 3 is pivotally connected to one of the carrying platform 1 and the first upper rod 23, and the other end of the driving device 3 is pivotally connected to one of the chassis 4 and the first lower rod 21. The driving device 3 is a linear driver, for example, an electric push rod, a cylinder, an oil cylinder, etc. In this embodiment, a fixing rod 27 is connected between the two first upper rods 23, one end of the driving device 3 is pivotally connected to the middle of the fixing rod 27, and the other end of the driving device 3 is pivotally connected to the chassis 4.

[0026] Please refer to again Figure 1 , Figure 2 and Figure 4, the lifting bracket 2 further includes a support leg 6. The support leg 6 is disposed on the chassis 4 and can extend out of the chassis 4 when the carrying platform 1 ascends, and can retract into the chassis 4 when the carrying platform 1 descends. By providing the support leg 6, support points can be added to the chassis 4, thereby enhancing the stability of the chassis 4. The lifting bracket 2 further includes a linkage mechanism 7. One end of the linkage mechanism 7 is disposed on one of the first lower strut 21 and the second lower strut 22, and the other end is disposed on the support leg 6 to drive the support leg 6. By providing the linkage mechanism 7, the support leg 6 can be automatically driven to extend and retract when the lifting bracket 2 ascends and descends, so that the support leg 6 does not need to be manually operated, improving the convenience of use. Specifically, the linkage mechanism 7 includes a linkage rod 71. The upper end of the linkage rod 71 is pivotally connected to one of the first lower strut 21 and the second lower strut 22. In this embodiment, the upper end of the linkage rod 71 is pivotally connected to the middle of the second lower strut 22, and the pivot axis is r. The lower end is slidably disposed on the chassis 4, and one end of the support leg 6 is connected to the lower end of the linkage rod 71. A sliding seat 8 is pivotally connected to the lower end of the linkage rod 71. The sliding seat 8 is slidably disposed on the chassis 4, and one end of the support leg 6 is pivotally connected to the sliding seat 8.

[0027] Please refer to again Figure 1 , Figure 2 and Figure 4, the support foot 6 includes a first support rod 61, a second support rod 62 and a support portion 63, one end of the first support rod 61 is pivoted to the chassis 4, one end of the second support rod 62 is pivoted to the sliding seat 8, the other end of the first support rod 61 and the other end of the second support rod 62 are pivoted to each other, and the support portion 63 is arranged on one of the first support rod 61 and the second support rod 62 or on the pivot axis between the first support rod 61 and the second support rod 62. In this embodiment, the support portion 63 is a roller, and the roller is pivoted to the pivot axis between the first support rod 61 and the second support rod 62. Specifically, a guide rod 41 is provided on the chassis 4, and a guide groove 411 is provided on the guide rod 41, and the sliding seat 8 is slidably arranged in the guide groove 411. In this way, the sliding movement of the linkage rod 71 can be guided, so that the extension and retraction of the support foot 6 is more stable and smooth. A variable triangular structure is formed between the first support rod 61, the second support rod 62 and the guide rod 41, so that when the sliding seat 8 approaches the first support rod 61, the angle between the first support rod 61 and the second support rod 62 becomes smaller, thereby pushing the roller out of the chassis 4; when the sliding seat 8 moves away from the first support rod 61, the angle between the first support rod 61 and the second support rod 62 becomes larger, thereby pushing the roller under the chassis 4.

[0028] Combining the above and Figure 2 , Figure 5 and Figure 6 The folding process of the lifting platform 100 of the utility model is described in detail below:

[0029] When the lifting platform 100 needs to be folded, the driving device 3 is started, and the output end of the driving device 3 contracts, thereby driving the first upper support rod 23 and the first lower support rod 21 to move, so that the parallelogram formed by the first upper support rod 23, the first lower support rod 21, the first connecting rod 25 and the second connecting rod 26 is deformed and folded. At this time, the pivot axis b and the pivot axis e are synchronously lowered in the direction close to the chassis 4. At the same time, the pivot axis b and the pivot axis e respectively drive the second upper support rod 24 and the second lower support rod 22 to descend, so that the bearing platform 1 moves in the direction close to the chassis 4. Finally, the entire lifting bracket 2 is completely folded and close to the chassis 4, and the bearing platform 1 also closes to the chassis 4, and the driving device 3 stops. When the lifting platform 100 needs to be unfolded, it is only necessary to start the driving device 3 again, and the output end of the driving device 3 extends out, thereby driving the lifting bracket 2 to unfold. At this time, the carrying platform 1 leaves the chassis 4 and rises. Finally, when the lifting bracket 2 is fully unfolded, the carrying platform 1 rises to the highest point.

[0030] Compared with the prior art, since the present utility model forms a deformable parallelogram structure among the first lower support rod 21, the second lower support rod 22, the first upper support rod 23, the second upper support rod 24, the first connecting rod 25 and the second connecting rod 26 by pivoting one end of the first lower support rod 21 to one end of the chassis 4 and the other end to the lower end of the first connecting rod 25; making the upper end of the first connecting rod 25 pivot to the middle part of the first upper support rod 23; further pivoting one end of the first upper rod to the other end of the bearing platform 1 and the other end to the upper end of the second connecting rod 26; and making the lower end of the second connecting rod 26 pivot to the middle part of the first lower support rod 21; thus, the first lower support rod 21, the first upper support rod 23, the first connecting rod 25 and the second connecting rod 26 can form a deformable parallelogram structure; then pivoting one end of the second lower support rod 22 to the other end of the chassis 4 and the other end to either one of the second connecting rod 26 and the first upper support rod 23 or coaxially pivoting to the pivot axis where the second connecting rod 26 and the first upper support rod 23 pivot to each other; and further pivoting one end of the second upper support rod 24 to the other end of the bearing platform 1 and the other end to either one of the first connecting rod 25 and the first lower support rod 21 or coaxially pivoting to the pivot axis where the first connecting rod 25 and the first lower support rod 21 pivot to each other, so that both ends of the bearing platform 1 can be jointly supported by the first upper support rod 23 and the second upper support rod 24. Moreover, such a lifting bracket 2 can enable the first lower support rod 21 or the second lower support rod 22 not to be connected to the chassis 4 in a relatively sliding manner, and enable the first upper support rod 23 or the second upper support rod 24 not to be connected to the bearing platform 1 in a relatively sliding manner. Therefore, the present utility model can avoid the traditional scissor structure, can not only realize the lifting of the lifting platform 100, but also enable the bearing platform 1 to be strongly supported all around after rising, with more balanced force, effectively preventing rollover, thus having higher safety and longer service life.

[0031] Please refer to Figure 7 , the figure shows the second embodiment of the lifting platform 200. The structure of the lifting platform 200 in this embodiment is basically the same as that of the first embodiment, the difference lies in the settings of the second lower support rod 22' and the second upper support rod 24'. In this embodiment, one end of the second lower support rod 22' is pivotally connected to the chassis 4, and the other end is pivotally connected to the second connecting rod 26, and the pivot point is k. One end of the second upper support rod 24' is pivotally connected to the bearing platform 1, and the other end is pivotally connected to the first connecting rod 25, and the pivot point is m. The technical effects achieved by the lifting platform 200 in this embodiment and the lifting platform 100 in the first embodiment are the same, and will not be repeated here.

[0032] Please refer to Figure 8, Figure 3 shows a third embodiment of the lifting platform 300. The structure of the lifting platform 300 in this embodiment is basically the same as that of the first embodiment, with the difference lying in the settings of the second lower support rod 22" and the second upper support rod 24". In this embodiment, one end of the second lower support rod 22" is pivotally connected to the chassis 4, and the other end is pivotally connected to the first upper support rod 23 at a pivot point n. One end of the second upper support rod 24" is pivotally connected to the carrying platform 1, and the other end is pivotally connected to the first lower support rod 21 at a pivot point p. The technical effects achieved by the lifting platform 300 in this embodiment and the lifting platform 100 in the first embodiment are the same, and will not be described again here.

[0033] The structures of the driving device 3 involved in the lifting bracket 2 of the present utility model are well-known to those of ordinary skill in the art, and will not be described in detail here.

[0034] The above-disclosed are only the preferred examples of the present utility model, and of course cannot be used to limit the scope of rights of the present utility model. Therefore, equivalent changes made according to the scope of the patent application of the present utility model still fall within the scope covered by the present utility model.

Claims

1. A lifting platform, characterized in that: The lifting bracket comprises a load-bearing platform, a lifting bracket, a driving device and a chassis, wherein the lifting bracket is connected between the load-bearing platform and the chassis; the lifting bracket comprises a first lower support rod, a second lower support rod, a first upper support rod, a second upper support rod, a first connecting rod and a second connecting rod; one end of the first lower support rod is pivotally connected to one end of the chassis, and the other end is pivotally connected to the lower end of the first connecting rod; the upper end of the first connecting rod is pivotally connected to the middle part of the first upper support rod; one end of the first upper support rod is pivotally connected to the other end of the load-bearing platform, and the other end is pivotally connected to the upper end of the second connecting rod; the lower end of the second connecting rod is pivotally connected to the middle part of the first lower support rod; the second lower support rod is cross-arranged with the first lower support rod, and One end of the second lower support rod is pivotally connected to the other end of the chassis, and the other end is pivotally connected to one of the second connecting rod and the first upper support rod, or is coaxially pivoted with a pivot axis on which the second connecting rod and the first upper support rod are pivotally connected; the second upper support rod and the first upper support rod are cross-arranged, and one end of the second upper support rod is pivotally connected to the other end of the carrying platform, and the other end is pivotally connected to one of the first connecting rod and the first lower support rod, or is coaxially pivoted with a pivot axis on which the first connecting rod and the first lower support rod are pivotally connected; the driving device is arranged between the carrying platform and the chassis and drives the lifting bracket to expand or retract, so that the carrying platform approaches or moves away from the chassis.

2. The lifting platform according to claim 1, characterized in that: One end of the driving device is pivotally connected to one of the carrying platform and the first upper support rod, and the other end of the driving device is pivotally connected to one of the chassis and the first lower support rod.

3. The lifting platform according to claim 1, characterized in that: The driving device is a linear drive.

4. The lifting platform according to claim 1, characterized in that: The chassis is provided with running wheels.

5. The lifting platform according to claim 1, characterized in that: The lifting bracket also includes a supporting foot, which is arranged on the chassis and can be extended out of the chassis when the carrying platform rises, and can be retracted into the chassis when the carrying platform descends.

6. The lifting platform according to claim 5, characterized in that: The lifting bracket further includes a linkage mechanism, one end of which is disposed on one of the first lower support rod and the second lower support rod, and the other end of which is disposed on the supporting foot to drive the supporting foot.

7. The lifting platform according to claim 6, characterized in that: The linkage mechanism comprises a linkage rod, the upper end of which is pivotally connected to one of the first lower support rod and the second lower support rod, and the lower end of which is slidably arranged on the chassis, and one end of the supporting foot is connected to the lower end of the linkage rod.

8. The lifting platform according to claim 7, characterized in that: The lower end of the linkage rod is pivotally connected to a sliding seat, the sliding seat is slidably arranged on the chassis, and one end of the supporting foot is pivotally connected to the sliding seat.

9. The lifting platform according to claim 8, characterized in that: The supporting foot includes a first supporting rod, a second supporting rod and a supporting portion, one end of the first supporting rod is pivotally connected to the chassis, one end of the second supporting rod is pivotally connected to the sliding seat, the other end of the first supporting rod and the other end of the second supporting rod are pivotally connected to each other, and the supporting portion is arranged on one of the first supporting rod and the second supporting rod or on a pivot axis between the first supporting rod and the second supporting rod.

10. The lifting platform according to claim 8, characterized in that: The chassis is provided with a guide rod, the guide rod is provided with a guide groove, and the sliding seat is slidably arranged in the guide groove.

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